Which of the following is formed from cells from the outer layer of the blastocyst and the uterine wall?

Ethan, a three year old, asks his mom to cut a pizza pie into twelve rather than eight pieces because he is "really hungry." On the basis of this example, it is most appropriate to conclude that Ethan:

a) understands object permanence. b) does not understand object permanence. c) understands conservation. d) does not understand conservation.

For which disorder was electroconvulsive therapy originally developed as a treatment?

a) panic b) schizophrenia c) bipolar disorder d) cyclothymia